Monthly fee levels
As a member of other sites in New Zealand, annual full subscription is $59-69 pa for NZ Personals and NZ Dating. Kiwi Swingers is $99 for the year full service.
We trialed a 3 month Grindr package which offered partial services but your standard monthly fees are very substantial - over $30 US pcm.
Given the small market in New Zealand I suggest you could offer a more tempting bundle than you do currently.